My arduino wont accept any code

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FQBN: arduino:avr:uno
Using board 'uno' from platform in folder: C:\Users\aadit\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6
Using core 'arduino' from platform in folder: C:\Users\aadit\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6

Detecting libraries used...
C:\Users\aadit\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR -IC:\Users\aadit\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\cores\arduino -IC:\Users\aadit\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\variants\standard C:\Users\aadit\AppData\Local\Temp\arduino\sketches\C5A069729AD12033665E5026AFE7E23F\sketch\Blink.ino.cpp -o nul
Generating function prototypes...
C:\Users\aadit\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR -IC:\Users\aadit\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\cores\arduino -IC:\Users\aadit\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\variants\standard C:\Users\aadit\AppData\Local\Temp\arduino\sketches\C5A069729AD12033665E5026AFE7E23F\sketch\Blink.ino.cpp -o C:\Users\aadit\AppData\Local\Temp\4000193918\sketch_merged.cpp
C:\Users\aadit\AppData\Local\Arduino15\packages\builtin\tools\ctags\5.8-arduino11/ctags -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives C:\Users\aadit\AppData\Local\Temp\4000193918\sketch_merged.cpp
Compiling sketch...
"C:\\Users\\aadit\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Users\\aadit\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\aadit\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\standard" "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F\\sketch\\Blink.ino.cpp" -o "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F\\sketch\\Blink.ino.cpp.o"
Compiling libraries...
Compiling core...
Using precompiled core: C:\Users\aadit\AppData\Local\Temp\arduino\cores\arduino_avr_uno_48856594185c9c01692edb3daac84e71\core.a
Linking everything together...
"C:\\Users\\aadit\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-gcc" -w -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections -mmcu=atmega328p -o "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F/Blink.ino.elf" "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F\\sketch\\Blink.ino.cpp.o" "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F/..\\..\\cores\\arduino_avr_uno_48856594185c9c01692edb3daac84e71\\core.a" "-LC:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F" -lm
"C:\\Users\\aadit\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-objcopy" -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F/Blink.ino.elf" "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F/Blink.ino.eep"
"C:\\Users\\aadit\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-objcopy" -O ihex -R .eeprom "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F/Blink.ino.elf" "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F/Blink.ino.hex"

"C:\\Users\\aadit\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-size" -A "C:\\Users\\aadit\\AppData\\Local\\Temp\\arduino\\sketches\\C5A069729AD12033665E5026AFE7E23F/Blink.ino.elf"
Sketch uses 924 bytes (2%) of program storage space. Maximum is 32256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
"C:\Users\aadit\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/bin/avrdude" "-CC:\Users\aadit\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf" -v -V -patmega328p -carduino "-PCOM4" -b115200 -D "-Uflash:w:C:\Users\aadit\AppData\Local\Temp\arduino\sketches\C5A069729AD12033665E5026AFE7E23F/Blink.ino.hex:i"

avrdude: Version 6.3-20190619
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2014 Joerg Wunsch

         System wide configuration file is "C:\Users\aadit\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"

         Using Port                    : COM4
         Using Programmer              : arduino
         Overriding Baud Rate          : 115200
avrdude: ser_open(): can't open device "\\.\COM4": Access is denied.



avrdude done.  Thank you.

Failed uploading: uploading error: exit status 1``

thats it